Focal length of 17-50mm (27 – 80mm when mounted on an APS-C Canon DSLR)
Comes with Sigma’s Hyper-sonic Motor for quiet auto-focusing
Fast maximum aperture of f/2.8
Optical Stabilizer provides up to four stops of image shake correction
FLD glass elements suppresses chromatic aberrations
Sigma 17-50mm F2.8 EX DC OS HSM Lens Nikon, Canon, Sony
The Sigma 17-50mm F2.8 EX DC OS HSM Lens is designed for DSLRs with crop sensors. Its 17-50mm focal length makes it a standard lens, a basic in any lens collection. Its visibility makes it a good choice for a number of types of photography. You can use this for portraits to street and action photography. Its F2.8 capabilities gives you a wonderful blurred background, ideal for portraits or shots where you want to highlight your subjects. Since it's a zoom lens, you can get a closer shot of your subjects even when you're taking pictures from afar.
Wide Open Aperture
Shooting on f2.8, you get better low light results and beautiful bokeh. The aperture opens up wide and lets in more light. You can set you ISO settings down a bit to avoid getting too much grain or noise, which is normal when shooting with a crop sensor DSLR at high ISO sensitivity.You also get better depth of field control with the wide aperture.
Less Shake
Sigma's Optical Stabilizer works as an image stabilizer that reduces vibration, a common problem when shooting handheld. This system helps ensure that you get perfect quality photos with sharp, clear details without having to use a tripod.
Speedy and Quite Focusing
Equipped with a Hyper Sonic Motor, this lens focuses smoothly and quietly. The fast auto-focus system work well, even in low light settings. It also has an inner focusing mechanize so the barrel length doesn't change. This helps with keeping accurate focus and minimizes the chance of the barrel shifting due to outside movement.
Compact Design
The Sigma 17-50mm F2.8 EX DC OS HSM design aims for simplicity and ease. At 565g / 19.9oz., this lens is a perfect travel buddy. It's an ideal all-around lens that you can bring with you anywhere. Its weight and size won't add much to your already heavy DSLR body.
Sigma 17-50mm F2.8 EX DC OS HSM Lens for Sony Specifications
